Programa de Doctorat en Arquitectura de Computadors: Enviaments recents
Ara mostrant els elements 241-260 de 272
Descubrimiento de servicios tolerante a fallos basado en hipercubos para sistemas distribuidos de gran escala
Current distributed systems that are capable of sharing resources in a distributed manner are experiencing an increase in their use and scope.This increased use in various application areas is largely due to the low cost ...
Programming and parallelising applications for distributed infrastructures
The last decade has witnessed unprecedented changes in parallel and distributed infrastructures. Due to the diminished gains in processor performance from increasing clock frequency, manufacturers have moved from uniprocessor ...
Performance and power optimizations in chip multiprocessors for throughput-aware computation
The so-called "power (or power density) wall" has caused core frequency (and single-thread performance) to slow down, giving rise to the era of multi-core/multi-thread processors. For example, the IBM POWER4 processor, ...
Evaluating techniques for parallelization tuning in MPI, OmpSs and MPI/OmpSs
Parallel programming is used to partition a computational problem among multiple processing units and to define how they interact (communicate and synchronize) in order to guarantee the correct result. The performance that ...
Wireless multimedia sensor networks, security and key management
Wireless Multimedia Sensor Networks (WMSNs) have emerged and shifted the focus from the typical scalar wireless sensor networks to networks with multimedia devices that are capable to retrieve video, audio, images, as well ...
Addressing practical challenges for anomaly detection in backbone networks
Network monitoring has always been a topic of foremost importance for both network operators and researchers for multiple reasons ranging from anomaly detection to tra c classi cation or capacity planning. Nowadays, as ...
Economic regulation for multi tenant infrastructures
Large scale computing infrastructures need scalable and effi cient resource allocation mechanisms to ful l the requirements of its participants and applications while the whole system is regulated to work e ciently. ...
Energy efficient cooperative node management for wireless multimedia sensor networks
In Wireless Multimedia Sensor Networks (WMSNs) the lifetime of battery operated visual nodes is limited by their energy consumption, which is proportional to the energy required for sensing, processing, and transmitting ...
Towards lightweight and high-performance hardware transactional memory
Conventional lock-based synchronization serializes accesses to critical sections guarded by the same lock. Using multiple locks brings the possibility of a deadlock or a livelock in the program, making parallel programming ...
Architecture support for intrusion detection systems
System security is a prerequisite for efficient day-to-day transactions. As a consequence, Intrusion Detection Systems (IDS) are commonly used to provide an effective security ring to systems in a network. An IDS operates ...
Visible, near infrared and thermal hand-based image biometric recognition
Biometric Recognition refers to the automatic identification of a person based on his or her anatomical characteristic or modality (i.e., fingerprint, palmprint, face) or behavioural (i.e., signature) characteristic. It ...
Reputation systems and secure communication in vehicular networks
A thorough review of the state of the art will reveal that most VANET applications rely on Public Key Infrastructure (PKI), which uses user certificates managed by a Certification Authority (CA) to handle security. By doing ...
Enhancing the efficiency and practicality of software transactional memory on massively multithreaded systems
Chip Multithreading (CMT) processors promise to deliver higher performance by running more than one stream of instructions in parallel. To exploit CMT's capabilities, programmers have to parallelize their applications, ...
Cross-layer modeling and optimization of next-generation internet networks
Scaling traditional telecommunication networks so that they are able to cope with the volume of future traffic demands and the stringent European Commission (EC) regulations on emissions would entail unaffordable investments. ...
Desarrollo de un workflow genérico para el modelado de problemas de barrido paramétrico en sistemas distribuidos
This work presents the development and experimental validation of a generic workflow model applicable to any parameter sweep problem: the Parameter Sweep Scientific Workflow (PSWF) model. As part of it, a model for the ...
Distributed detection of anomalous internet sessions
Financial service providers are moving many services online reducing their costs and facilitating customers¿ interaction. Unfortunately criminals have quickly found several ways to avoid most security measures applied to ...
Channel assignment protocols for multi-radio multi-channel wireless mesh netwworks
The increasing demand for large and low cost wireless coverage, ranging from campus to city wide areas, has motivated a high interest in multi-hop communications with Wireless Mesh Networks (WMN) based on IEEE 802.11s as ...
Characterization, design and re-optimization on multi-layer optical networks
L'augment de volum de tràfic IP provocat per l'increment de serveis multimèdia com HDTV o vídeo conferència planteja nous reptes als operadors de xarxa per tal de proveir transmissió de dades eficient. Tot i que les xarxes ...
An Online writer recognition system based on in-air and on-surface trajectories
The main motivation of this dissertation is the exploration of the field of online text-dependent writer recognition, in order to provide evidence of the usefulness of short sequences of text to perform identification and ...
DVFS power management in HPC systems
Recent increase in performance of High Performance Computing (HPC) systems has been followed by even higher increase in power consumption. Power draw of modern supercomputers leads to very high operating costs and ...
